SKR: Sakaerat
General site details
| Site name | Sakaerat |
|---|---|
| AsiaFlux site code | SKR |
| Location | Sakaerat Environmental Research Center, Sakaerat, Nakonrachasima, Thailand |
| Position | 14º 29' 32.5" N, 101º 54' 58.7" E (WGS84) |
| Elevation | 543 m above sea level (WGS84) |
| Slope | 6m/100m |
| Terrain type | Approximately flat |
| Area | 78km2 |
| Fetch | - |
| Climate | Tropical - desert (Aw) |
| Mean annual air temperature | 24 degree C |
| Mean annual precipitation | 1200-1300 mm |
| Vegetation type | Tropical seasonal evergreen forest |
| Dominant Species (Overstory) | Hopea ferrea Pierre |
| Dominant Species (Understory) | - |
| Canopy height | 35 m |
| Age | Mature forest |
| LAI | 3.5-4.0 m2 m-2 (PAI) |
| Soil type | Shallow Stony Ultisols (US Soil Texonomy) |
Observation
Eddy Covariance method (CO2)
| System | Closed-path system |
|---|---|
| Wind speed | Three-dimensional sonic anemometer-thermometer (Wind Master, Gill) |
| Air temperature | Three-dimensional sonic anemometer-thermometer (Wind Master, Gill) |
| Water vapor | Closed-path CO2/H2O analyzers (LI-6262, LI-COR) |
| CO2 | Closed-path CO2/H2O analyzers (LI-6262, LI-COR) |
| Measurement height | 45 m |
| Sampling frequency | 4 Hz |
| Averaging time | 30 min |
| Data logger | NR-1000, Keyence, Japan |
| Data storage | HDD (Laptop PC) |
| Original data | Raw data |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming) | 45 m | Radiometer (CNR1, Kipp&Zonen) |
| Global solar radiation (outgoing) | 45 m | Radiometer (CNR1, Kipp&Zonen) |
| Long-wave radiation(outgoing) | 45 m | Radiometer (CNR1, Kipp&Zonen) |
| Long-wave radiation(outgoing) | 45 m | Radiometer (CNR1, Kipp&Zonen) |
| Net radiation | 45 m | Radiometer (CNR1, Kipp&Zonen) |
| PPFD (incoming) | 45, 1 (two points) m | Quantum sensor (ML-020V, Eko, Japan) |
| PPFD (outgoing) | 45 m | Quantum sensor (ML-020V, Eko, Japan) |
| Direct / diffuse radiation | 45 m | Pyranometer (ML-020V, Eko, Japan) |
| Direct / diffuse PPFD | 45 m | Pyranometer (ML-020V, Eko, Japan) |
| Air temperature | 45, 35, 20, 5 m | Platinum resistance thermometer and capacitive hygrometer (HMP45A, Vaisala) |
| Humidity | 45, 35, 20, 5 m | Platinum resistance thermometer and capacitive hygrometer (HMP45A, Vaisala) |
| Soil temperature | 1, 5, 10, 20, 50 cm | Platinum resistance thermometer |
| Soil heat flux | 2 cm (two points) | Soil heat flux plate (MF-81, Eko, Japan) |
| Soil water content | 10cm, 50cm | Water content reflectometer (CS615, Campbell) |
| Wind speed | 47 m | Combined wind vane and fan anemometer (Met One, Campbell) |
| Wind direction | 47 m | Combined wind vane and fan anemometer (Met One, Campbell) |
| Precipitation | 47 m | Tipping-bucket rain gauge (TE525, Campbell) |
| CO2 concentration | 45, 35, 20, 5 m | Closed-path infrared gas analyzer (LI-6262, LI-COR) |
| Radiation Temperature | - | Infrared thermometer (IT-340, Horiba, Japan) |
Other
| Soil respiration | Chamber method, frequency: hourly |
| Ecological investigation | - |
Observation Period and Data Availability
| Measurement Period | from March 2001 to present |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | 2001-2003 in AsiaFlux Database |
Contact
Takahisa Maeda (takahisa.maeda [at] aist.go.jp) National Institute of Advanced Industrial Science and Technology
16-1 Onogawa, Tsukuba 305-8569, Japan
Tel : +81-29-861-8418 Fax : 81-29-861-8358
[Soil respiration] Samreong Panuthai (newsam [at] truemail.co.th)
Watershed Conservation and Management Office National Park,
Wildlife and Plant Conservation Department, Bangkok, Thailand
Tel : +66-2-5614292 ext. 918, 920
[Photosynthesis] Atsushi Ishida, Forestry and Forest Products Research Institute, Tsukuba, Japan
(atto [at] ffpri.affrc.go.jp)
Others
[Photosynthesis]
Sapit Diloksumpun, Kasetsart University, Bangkok, Thailand
[Ecological Investigation]
Mamoru Kanzaki, Kyoto University, Kyoto, Japan
[Ecological Investigation]
Hirokiyo Takeda, Kyoto University, Kyoto, Japan
Infrastructure
Tower, Electrical power (Solar cell system), Accommodation
Research Fund
Global Environment Research Fund S-1 (FY2003-2006) by Ministry of Environment, Japan